The structural and bonding properties of hydrogenated amorphous silicon were investigated. The formation of clusters and chains of hydrogen atoms was observed upon quenching a hydrogenated liquid silicon sample to room temperature. The high-temperature stability of the amorphous network was investigated as a function of the hydrogen content. The amorphous silicon lattice was found to be unstable at high temperature when the hydrogen content was above 10%.

Bonding and Diffusion in Hydrogenated Amorphous Silicon by Tight-Binding Molecular Dynamics. Lanzavecchia, S., Colombo, L.: Materials Science and Engineering B, 1996, 36[1-3], 264-7. See also: Materials Research Society Symposium - Proceedings, 1996, 396, 33-8